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This gray card is to provide a standard reference object for exposure determination in photography.
By placing a gray card in the scene to be photographed, oriented at a defined angle relative to the direction of the incident light, and taking a reading from it with a reflected light meter, the photographer can be assured of consistent exposures across their photographs.
For post-processing white balance, a photo of the gray card in the scene is taken, and the image processing software uses the data from the pixels in the gray card area of the photo to set the white balance point for the whole image.
Gray cards can be used for in-camera white balance or post-processing white balance. Many digital cameras have a custom white balance feature. A photo of the gray card is taken and used to set white balance for a sequence of photos.
In addition to providing a means for measuring exposure, a gray card provides a convenient reference for white balance, or color balance, allowing the camera to compensate for the illuminant color in a scene.
Specifications:
- Model: R-21
- Material: PU, could be cleaning with water
- Color: Grey & White
- Card Size: Approx. 60 * 60cm / 24 * 24in
- Package Size: 24 * 23 * 3.5cm / 9.4 * 9.1 * 1.4in
- Package Weight: 370g / 13oz
Package List:
- 1 * 18% Gray White Balance Focus Card
- 1 * Carrying Bag
Lee Nason
2025-08-15 12:46:24
My go to card
Jim Clenney
2025-08-11 13:50:21
It arrived on time and works great! I get perfect white balance and exposure every time. I use it mostly with getting correct exposure and white balance on the Canon C200. I've used it in different lighting, indoors and outdoors and it still gives me the balance and exposure that I need. Will probably buy another one of these again soon.
Bartol Babich
2025-07-30 13:36:14
Title.
GK
2025-07-25 15:06:27
This card has helped set the white balance properly while shooting under indoor lighting. I keep it in a corner in my house unfolded in its carrying case. While traveling, I just put it in the top zipper pocket of the travel bag. I took it on a international trip 5 months ago. So far, I have not found it necessary to fold it. I am not confident the frame can handle multiple folds / unfolds.
D. Block
2025-06-20 15:26:30
Had to return and place a new order, the first one had the center markings quite off center and did not have a top handle like the one pictured in the description. Also was not fully stretched in the frame. The second one had its center markings centered, fully stretched out (no wrinkles) but still no handle…
Customer
2024-12-12 18:02:34
They say it's foldable but the case they give you is for the unfolded position. How useless is that. The point is to be able to fold it to 1/4 of it's size and store it in your camera bag/backpack. But you can't because it's spring loaded and wont stay folded on its own. I've used folding things like this before and the point of the case is that it's at the folded size to keep the thing from opening up on its own. This product has a case for the full size.
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